### The Physics of Santa

I am unsure who the author is (I would love to give credit where credit is certainly due), but here is the classic Physics of Santa...enjoy.

**A consultant report about Santa ...**

**There are approximately two billion children (persons under 18)in the world. However, since Santa does not visit children of Muslim, Hindu, Jewish or Buddhist religions, this reduces the workload for Christmas night to 15% of the total, or 378 million. Santa has about 108 million homes to visit and 31 hours of Christmas to work with, thanks to the different time zones and the rotation of the earth, assuming he travels east to west. This works out to 967.7 visits per second. This is to say that for each Christian household with a good child, Santa has around 1/1000th of a second to park the sleigh, hop out, jump down the chimney, fill the stockings, distribute the remaining presents under the tree, eat whatever snacks have been left for him, get back up the chimney, jump into the sleigh and get on to the next house. Assuming that each of these 108 million stops is evenly distributed around the earth, we are now talking about 0.78 miles per household; a total trip of 75.5 million miles.****This means Santa's sleigh is moving at 650 miles per second. The payload of the sleigh adds another interesting element. Assuming that each child gets nothing more than a medium sized Lego set weighing two pounds, the sleigh is carrying over 500 thousand tons, not counting Santa himself. On land, a conventional reindeer can pull no more than 300 pounds.**

Even granting that the "flying" reindeer could pull ten times the normal amount, the job can't be done with eight or even nine of them --- Santa would need 360,000 of them. This increases the payload, not counting the weight of the sleigh, another 54,000 tons, or roughly seven times the weight of the QE2 (the ship, not the monarch). 600,000 tons traveling at 650 miles per second creates enormous air resistance --- this would heat up the reindeer in the same fashion as a spacecraft re-entering the earth's atmosphere. The lead pair of reindeer would absorb 14.3 quintillion joules of energy per second each. In short, they would burst into flames almost instantaneously, exposing the reindeer behind them and creating deafening sonic booms in their wake.Even granting that the "flying" reindeer could pull ten times the normal amount, the job can't be done with eight or even nine of them --- Santa would need 360,000 of them. This increases the payload, not counting the weight of the sleigh, another 54,000 tons, or roughly seven times the weight of the QE2 (the ship, not the monarch). 600,000 tons traveling at 650 miles per second creates enormous air resistance --- this would heat up the reindeer in the same fashion as a spacecraft re-entering the earth's atmosphere. The lead pair of reindeer would absorb 14.3 quintillion joules of energy per second each. In short, they would burst into flames almost instantaneously, exposing the reindeer behind them and creating deafening sonic booms in their wake.

**The entire reindeer team would be vaporized within 4.26 thousandths of a second, or right about the time Santa reached the fifth house on his trip. Not that it matters, however, since Santa, as a result of accelerating from a dead stop to 650 m.p.s. in .001 seconds, would be subjected to inertial forces of 17,500 g's. A 250 pound Santa (which seems ludicrously slim) would be pinned to the back of the sleigh by 4,315,015 pounds of force, instantly crushing his bones and organs and reducing him to a quivering blob of pink goo. Therefore, if Santa did exist, he's dead now. Sorry....**
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